With the experimental realization of stable self-bound ultradilute “quantum droplets” made of bosonic atoms
of a binary mixture,[1]}
which have been found to sustain quantum vortices,[2]}
it has been possible to study the collision of self-bound BECs.[3]}, [4]}
Thus, it should also be possible to study the merging of quantum droplets and
the influence of surface effects in the transfer of angular momentum from one quantum droplet to another,
as well as a deeper analysis of the role of the surface protrusions as potential nucleation sites of vortex rings, thus
connecting the ultradilute quantum droplet BECs and the superfluid \(^4\) He droplets scenarios.
